Income Taxes (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Total unrecognized tax benefit	$ 19.9	$ 17.9	$ 14.0
Recognized interest expense	(0.1)	1.5	0.7
Interest accrued	1.7	1.8	0.8
Penalties accrued	0.0	0.8	$ 0.8
Deferred tax assets, valuation allowance	$ 25.1	$ 27.6